Definitions for keelboatˈkilˌboʊt
Random House Webster's College Dictionary
a roughly built, shallow freight boat having a keel to permit sailing into the wind.
Category: Nautical, Navy
Origin of keelboat:
river boat with a shallow draught and a keel but no sails; used to carry freight; moved by rowing or punting or towing
Any sailboat having a keel (as opposed to a centerboard or daggerboard).